KR101846421B1 - Non-point pollution reducing system - Google Patents

Abstract

Disclosed is a nonpoint pollution reducing system having a new structure to improve a medium cleaning effect of the nonpoint pollution reducing system. According to the present invention, the nonpoint pollution reducing system comprises: a water collection tank having a space portion into which rainwater flows; and a filter tank separated from the water collection tank with a partition wall, connected to the water collection tank by a water gate formed in a lower portion of the partition wall, having a filter layer in an upper portion of the water gate, and comprising a buoyancy type valve discharging pollutants to the water collection tank when back washing air in an upper portion of the filter layer and an air blow pipe generating a bubble to back wash the air in a lower portion of the filter layer. The buoyancy type valve is opened and closed in accordance with a water level of the water collection tank.

Description

{NON-POINT POLLUTION REDUCING SYSTEM}

The present invention relates to a nonpoint pollution abatement facility, and more particularly, to a nonpoint pollution abatement facility capable of backwashing using bubbles.

Water pollution sources are classified into Point Pollution Source and Non-Point Pollution Source for the convenience of prevention and management. Point pollution sources are pollution sources that pollutants are discharged from sewage pipes or waterways in certain areas such as sewage treatment plants, wastewater treatment plants, power plants, abandoned mines, oil tanks and oil wells. Non-point pollution sources are unclear in the emission area and remain on a wide range of ground surface. In rain, rainwater flows into rivers and groundwater and causes water pollution.

From the past to the present, management and support at the central government level related to pollutant disposal have been concentrated on workplaces with clear emission sources, sewage treatment facilities, wastewater treatment facilities, animal wastewater treatment facilities, and manure treatment facilities. However, the recent comprehensive management of four major rivers and management of total amount of water pollutants have led to the management of non-point pollutants in roads and parking lots where it is difficult to identify the exact runoff path and the inflow of pollutants is non-persistent. It is strengthening.

Korean Patent Registration No. 10-0538124 (2005.12.15) discloses a non-point pollutant treatment apparatus for efficiently treating non-point pollutants introduced into rivers. Such a non-point pollution treatment apparatus includes a filtration layer for filtering rainwater, and a backwashing process for cleaning the filtration layer after filtration is required.

Korean Patent Registration No. 10-0538124 discloses a water treatment system that purifies water by using polyethylene and a carrier made of waste tire so as to efficiently treat nonpoint pollutants introduced into streams in the treatment of nonpoint pollutants Lt; / RTI > However, since the treated water that has passed through the filtration tank can not be recycled as backwash water and the clogging state of the filtration layer and the state of adsorbing contaminants can not be observed, there is a problem that maintenance is not smooth.

Korean Patent No. 10-1242378 discloses a non-point pollution abatement facility capable of automatic backwashing using a flocculant. However, only a downward flow (backward to upward from the filtration layer) There is a problem that the effect is not sufficient.

The present invention aims to provide a new non-point pollution abatement facility capable of maximizing the cleaning effect in the backwash of the nonpoint pollution abatement facility.

In order to solve the above-described problems, the present invention provides a water collecting apparatus, comprising: a water collecting tank having a space for introducing rainwater; And a filter layer separated from the water collecting tank and the partition wall and communicating with the water collecting tank by a water gate formed at a lower portion of the partition wall, a filtration layer disposed above the water receptacle, And a filtration tank having a buoyancy type valve for generating air bubbles for generating air bubbles at a lower portion of the filtration layer, wherein the buoyancy type valve is provided with a non-point pollution abatement facility which is opened or closed according to a water level of the water collecting vessel do.

The water collecting tank is provided with a stagnant water pump for discharging stagnant water therein.

In addition, the filtration tank is installed on the upper portion of the buoyancy type valve so as to be movable up and down in the air backwash, and filters and adsorbs contaminants contained in the remaining water inside the filtration tank by the air backwash, And a decanter connected to the buoyancy type valve through a lower discharge pipe so as to be discharged.

The buoyancy type valve is protruded to the inside of the water collecting tank, and an opening / closing part that is opened / closed by buoyancy is coupled to one end of the outlet port.

The discharge port is formed bending downward of the water collecting tank, and the opening / closing part includes a floating fluid that moves up and down according to a water level, and a blocking plate formed with an opening / Wherein the floating plate is provided with an air hole for receiving the floating body and a through hole not blocked by the floating fluid.

The discharge port is formed bending downward of the water collecting tank, and the opening / closing part has a plate-like floating plate which is in close contact with the discharge port to block the fluid flow. The floating plate has a hinge- Or is connected to a guide rod passing through the protrusion, and the outlet is opened or closed according to the water level of the water collecting tank.

The non-point pollution abatement facility is connected to the filtration tank through a connection port formed in the upper part of the separation wall, the backwash pump for supplying the treated water to the filtration tank, And a treatment tank having a reverse water supply pipe for supplying reverse osmosis water between the connection port and the filtration layer.

Also, the water gate is provided with a number of rotary plates arranged closely to each other, the rear edge of the rotary plate extending rearward, and a watertight portion formed at a lower portion of the rotary plate.

According to the present invention, it is possible to provide a non-point pollution abatement facility capable of improving the backwash effect by removing airborne contaminants by generating air bubbles in the lower part of the filtration layer.

In addition, it is possible to provide a non-point pollution abatement facility having a stable treatment effect by preventing floating and contaminating of floating pollutants at the start of next rainfall by removing floating pollutants that can settle on the filtration layer after the end of rainfall.

Also, a new structure of a non-point pollution abatement facility capable of maximizing the cleaning effect can be provided by additionally performing a backwash using filtered treated water.

1 is a perspective view of a nonpoint pollution abatement facility according to an embodiment of the present invention,
2 is a cross-sectional view of a filtration tank according to an embodiment of the present invention,
3 is a perspective view and a sectional view of a decanter installed in a filtration tank according to an embodiment of the present invention,
4 is a perspective view of a buoyancy valve according to an embodiment of the present invention,
5 is a perspective view of a buoyancy type valve according to another embodiment of the present invention,
6 is a perspective view of a buoyant valve according to another embodiment of the present invention,
FIG. 7 is a schematic view illustrating a flow of a filtration process of a non-point pollution abatement facility according to an embodiment of the present invention; FIG.
FIG. 8 is a schematic view showing a flow of a backwash process of a nonpoint pollution abatement facility according to an embodiment of the present invention; FIG.
9 is a view of a water gate according to an embodiment of the present invention,
Fig. 10 is a view showing a flow of fluid or the like passing through a water gate according to Fig. 9; Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to denote the same parts throughout the specification, and the details of the present invention will be described with reference to the drawings. Also, throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements, unless specifically stated otherwise.

FIG. 1 is a perspective view of a non-point pollution abatement facility 100 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a filtration tank 120 according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, the non-point pollution abatement facility 100 according to the present invention includes a water collecting tank 110 having a space for introducing rainwater, And a filter layer 123 separated from the water collecting tank 110 and the partition wall 121 and connected to the water collecting tank 110 by a water gate 122 formed under the partition wall 121, A buoyancy type valve 124 for discharging contaminants when the air is backwashed to the water collecting tank 110 at an upper portion of the filtration layer 123 and a buoyancy type valve 124 for discharging air bubbles The buoyancy type valve 124 is opened and closed according to the water level of the water collecting tank 110. The buoyancy type valve 124 is opened and closed according to the water level of the water collecting tank 110. Therefore, suspended pollutants in the filtration tank 120 can be discharged to the water collection tank 110 without a power source.

The water collecting tank 110 may have a space for storing storms therein, and an inlet 111, which is a passage through which storm water flows into one surface. 8 (d) (see FIG. 8 (d) A1 and A2) in the water collecting tank 110 at the end of the rainfall, and the buoyancy valve 124 is opened A stagnant water pump 112 for discharging the stagnant water inside (to lower the water level of the water collecting tank) may be provided.

The filtration tank 120 is a space for filtering out the rainwater stored in the water collecting tank 110. The filtration tank 120 is located at one side of the water collecting vessel 110 and is separated from the water collecting vessel 110, And communicates with the water collecting tank (110) by opening and closing the formed water gate (122). When the floodgate 122 is opened and the stormwater flows into the filtration tank 120, the floodgate 122 forms an upward flow. In order to start the air backwashing according to the present invention, The buoyancy type valve 124 is opened by discharging the congestion water in the water collecting tank 110 after the water collecting tank 110 and the filtration tank 120 are completely separated.

The operation of the air cylinder 122, the gear motor 130, and the like is not particularly limited. For example, in the backwashing process, And may be an air cylinder system linked to a bubble generator generating the gas.

FIG. 9 is a view showing a water gate according to an embodiment of the present invention, and FIG. 10 is a view showing a flow of fluid passing through a water gate according to FIG.

9 and 10, the water gate 122 has a number of swing plates 122a closely arranged in order to smooth the flow of the fluid and settling contaminants in the fluid, And the watertight portion 122c may be formed at a lower portion of the rotary plate 122a (a portion where the rotary plate is in close contact with each other).

At this time, in order to smooth the flow of the rainwater from the lower part of the water collecting tank 110 to the upper part of the filtration tank 120 (refer to FIG. 10A), when the water gate 122 is opened, And one end and the other end of the swash plate 122a may diagonally extend toward the upper portion of the filtration tank 120 (see FIG. 9 (b)) in the open state of the water gate 122, The blocking plate 122b rotates integrally with the rotation plate 122a, and contaminants contained in the rainwater are collided and settled in the open state of the water gate, thereby improving the filtration efficiency (see FIG. 10 (b)). The watertight portion 122c is formed at an end where the rotation plate 122a is in close contact with the frame surrounding the other rotation plate 122a or the rotation plate 122a adjacent to the rotation plate 122a. .

The filtration layer 123 filters the precipitation in the filtration tank 120. For example, a sponge filter medium can be used to filter and adsorb contaminants included in precipitation to improve water quality. The filter layer 123 may be formed of several layers using different kinds of filter materials to enhance the filtering effect. A mesh network (not shown) may be formed on the filter layer 123 to prevent separation of the filter material. .

The present invention may include a buoyancy type valve 124 and an air diffuser 125 to perform air backwashing to improve backwash efficiency of the nonpoint pollution abatement facility 100. The buoyancy type valve 124 is formed on the partition wall 121 and may be located above the filtration layer 123. The buoyancy type valve 124 may be opened or closed according to the water level of the water collection tank 110, To the water collecting tank (110). The air diffuser 125 is connected to the bubble generator B and generates air bubbles in the lower portion of the filtration layer 123 to remove contaminants that have been filtered and adsorbed on the filtration layer 123, ). ≪ / RTI >

3 is a perspective view and a cross-sectional view of a decanter 126 installed in a filtration tank 120 according to an embodiment of the present invention.

Referring to FIG. 3, the filtration tank 120 may further include a decanter 126. The decanter 126 is installed on the upper part of the filtration layer 123 so as to be movable up and down in the air backwash (not fixed to a wall surface or the like) The valve 126 is connected to the buoyancy valve 124 through a lower outlet pipe 126a to filter and adsorb contaminants contained in the buoyancy valve 124 (see FIG. 8 (a) R).

The discharge pipe 126a may be embodied in the filtration layer 123 and may be connected to the decanter 126 by air bubbles of the air diffuser 125 when the air is backwashed. 126 are moved up and down, thereby facilitating the discharge of floating contaminants. In this case, the buoyancy valve 124 may be positioned lower than the filtration layer 123.

 As shown in FIG. 3, the decanter 126 includes a lower surface 126c having a vertical cross section of an inverted trapezoidal cross-section and having a hollow h connected to the discharge pipe 126a, And a pair of side surfaces 126e formed adjacent to the lower surface 126c and the inclined surface 126d. The inclined surface 126d is provided with a contaminant May be formed on the top of the decanter. In addition, the lower surface 126c may be formed with fine holes (not shown) other than the hollow h.

The decanter 126 secures the flow space of the filter media during air backwashing and is located above the filter layer 123 to increase the density of the filler material by its own weight, thereby improving the processing efficiency.

The buoyancy type valve 124 is protruded to the inside of the water collecting tank 110 to be opened and closed according to the water level of the water collecting tank 110 and an opening and closing part 124b which is opened and closed by buoyancy is coupled to one end of the discharge port 124a have.

Although the shape of the buoyancy valve 124 is not particularly limited, the discharge port 124a is bent downwardly of the water collecting tank 110 according to an embodiment of the present invention, and the opening / A blocking plate 12 including a float 11 rising and falling according to the level of the water collecting tank 110 and having an opening and closing hole 12a through which the flow of fluid is blocked by the adhesion of the float 11, And a flow plate 13 having a through hole 13a in which the float 11 is seated and a through hole 13b which is not blocked by the float 11 are formed.

4 is a perspective view of a buoyancy valve 124 according to an embodiment of the present invention.

4, when the level of the water collecting tank 110 rises (refer to FIG. 4A), the float 11 rises and comes in close contact with the opening / closing hole 12a formed in the blocking plate 12, The flow of the stormwater through the buoyancy type valve 124 into the water collecting tank 110 is blocked. 4 (b)), when the float 11 descends and is placed in the air-through hole 13a formed in the flow-through plate 13, the remaining water in the filtration tank 120 (See FIG. 8 (b) R) can be flowed to the collection vessel 110 through the through-hole 13b formed in the distribution plate 13.

The buoyancy type valve 124 according to another embodiment of the present invention is configured such that the discharge port 124a is bent downwardly of the water collecting tank 110 and the opening and closing part 124b is in close contact with the discharge port 124a, And the floating plate 22 is hinged to one end of the protrusion 21 formed at the end of the discharge port 124a or is inserted into the protrusion 21 through the protrusion 21, And the outlet 124a may be opened or closed according to the level of the water collecting tank 110. [

FIG. 5 is a perspective view of a buoyancy valve 124 according to another embodiment of the present invention, and FIG. 6 is a perspective view of a buoyancy valve 124 according to another embodiment of the present invention.

5 and 6, when the water level of the water collecting tank 110 rises (refer to FIG. 5A and FIG. 6A), the floating plate 22 rises together and is brought into close contact with the discharge port 124a , The flow of the rainwater through the buoyancy type valve (124) is blocked in the filtration tank (120). When the water level of the water collecting tank 110 is lowered (see FIGS. 5B and 6B), the floating plate 22 descends together to open the discharge port 124a, (See FIG. 8 (b) R) may be passed through the discharge port 124a to the water collecting tank 110.

The non-point pollution abatement facility 100 according to the present invention further includes a treatment tank 130 installed at one side of the filtration tank 120 to perform secondary backwashing using water that has been filtered through the filtration tank 120, As shown in FIG. The present invention can effectively remove contaminants remaining in the filtration layer as compared with the conventional non-point pollution abatement facility by performing air backwash and water backwash, thereby increasing the filtration efficiency of the excellence and increasing the replacement period of the filtration layer, Implement a pollution abatement facility.

1, the treatment tank 130 is divided into the filtration tank 120 and the separation wall 131 and is connected to the filtration tank 120 by the connection port 131a formed on the separation wall 131. [ A backwash pump 132 for supplying the internal treatment water to the filtration tank 120 and a backwash pump 132 connected to the backwash pump 132 for supplying reverse osmosis water between the connection port 131a and the filtration layer 123, And a reverse water supply pipe 132a. And a treatment water outlet 133 for discharging the treated water in the treatment tank 130 to the outside.

The connection port 131a formed in the separation wall 131 allows the treated water on the filtration tank 123 having passed through the filtration layer 123 to flow into the treatment tank 130. The backwash pump 132 and the reverse water supply pipe 132a may be provided in the treatment tank 130 in order to use the treated water from which pollutants have been removed in the backwash of the filtration layer 123. [ The backwash water supply pipe 132a is connected to the separating wall 131 and is connected to the filtration layer 123 by the downward flow from the upper part of the filtration layer 123. Therefore, .

In the case where the filtration layer 123 includes several layers, the filtration layer 123 may be formed on each filtration layer. If the filtration tank 120 includes the decanter 126 according to an embodiment of the present invention, As shown in FIG. 4A.

The filtration process and the backwash process of the nonpoint pollution abatement facility according to the present invention constructed as described above will be described.

FIG. 7 is a schematic view showing a flow of the filtration process of the non-point pollution abatement facility 100 according to an embodiment of the present invention. FIG. 8 is a schematic view of the nonpoint pollution abatement facility 100 according to an embodiment of the present invention. FIG. 3 is a schematic view showing the flow of the backwash process. FIG.

1 and 7, the filtration process includes a stormwater inflow step (see FIG. 7 (a)) in which the water level of the water collecting tank 110 and the filtration tank 120 are raised together when the stormwater flows into the water collecting tank 110 while the water gate 122 is opened the amount of rise of the water level of the filtration tank 120 becomes smaller than the amount of rise of the water level of the water collecting tank 110 while the water level of the filtration tank 120 rises and reaches the filtration layer 123, And the treated water C that has passed through the filtration layer 123 is stored in the treatment tank 130 through the connection port 131a and discharged into the treated water outlet 133. [ (See Fig. 7 (c)).

At this time, the water level of the water collecting tank rises and the buoyancy type valve 124 is closed in the storm inflow step, so that the treated water C in the filtration tank 120 is discharged through the connection port 131a, not the buoyancy type valve 124, (130).

Referring to FIGS. 1 and 8, the backwashing process according to the present invention can be performed by air backwash and water backwash.

8 (a) to 8 (c), air stagnation is generated by closing the water gate 122 and discharging the stagnant water T in the water collecting tank 110 8 (c)) which removes foreign matter from the filtration layer 123 through the air diffuser 125 and the buoyancy type valve 124 to remove pollutants in the filtration tank 120 from the collection tank (Fig. 8 (c)) of discharging the remaining water (R)

At this time, since the water level of the water collecting tank 110 is lowered by the discharge of the stagnation water T and the buoyancy type valve 124 is opened, the residual water R existing on the filtration layer 123 and the floating water The material is discharged through the buoyancy valve 124 to the water collecting tank 110.

Next, referring to FIGS. 8 (d) and 8 (e), the water washing step includes a first washing water discharging step of discharging the first washing water A1 left in the water collecting tank 110 after air backwashing and opening the water gate 122, (See C in Fig. 7 (c)) in the treatment tank 130 through the wash water supply pipe 132a to the lower part of the filtration layer 123, And a second washing water discharging step of discharging the second washing water A2 collected in the water collecting tank 110 through the second washing water 122.

The preferred embodiments of the present invention have been described in detail with reference to the drawings. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Accordingly, the scope of the present invention is defined by the appended claims rather than the description of the invention, and all changes or modifications derived from the meaning, scope and equivalence of the claims are deemed to be included in the scope of the present invention. .

100: Nonpoint pollution abatement facility 110: Sink tank
111: Strong inlet 112: Stagnant water pump
120: Filtration tank 121:
122: Water gate 122a:
122b: shielding plate 122c: watertight portion
123: filtration layer
124: Buoyant type valve 124a: Outlet
124b: opening / closing part 11: float
12: blocking plate 13: distribution plate
12a: opening and closing ball 13a:
13b: Through hole 21: Projection
22: floating plate 23: guide rod
125: Acanthracenter 126: Decanter
126a: discharge pipe 126b:
126c: lower surface 126d: inclined surface
126e: Side 130: Treatment tank
131: separating wall 131a: connector
132: backwash pump 132a: reverse osmosis supply pipe
133: treated water outlet A1: first washing water
A2: Second washing water B: Bubble generator
C: treated water R: remaining water
T: Number of stagnation h: Hollow

Claims (8)

A water collecting tank in which a space for introducing stormwater is formed; And
And a filter layer disposed on the watertight compartment and connected to the water collecting tank by a water gate formed at a lower portion of the partition wall, And a filtration tank having a buoyancy type valve and an air diffusing pipe for generating air bubbles below the filtration layer,
Wherein the buoyancy type valve is opened and closed in accordance with the level of the water collecting tank,
Wherein the water gate has a plurality of rotary plates closely arranged in parallel with each other, and a shielding plate is extended rearward from an upper portion of the rotary plate, and a watertight portion is formed at a lower portion of the rotary plate. The method according to claim 1,
Wherein the water collecting tank is provided with a stagnant water pump for discharging stagnant water therein. The method according to claim 1,
Wherein the filtration tank is provided so as to be movable up and down in the upper portion of the buoyancy type valve and filters and adsorbs contaminants contained in the remaining water inside the filtration tank by the air backwash, Further comprising a decanter connected to the buoyancy type valve through a lower discharge pipe so that the buoyancy type valve can be operated. The method according to claim 1,
Wherein the buoyancy type valve is protruded to the inside of the water collecting tank, and an opening / closing part opened / closed by buoyancy is coupled to one end of the outlet. 5. The method of claim 4,
The discharge port is formed bending downward of the water collecting tank,
Wherein the opening and closing part includes a floating body that moves up and down according to a water level and is provided with a blocking plate having an opening and closing hole through which the fluid flow is blocked by the close contact of the floating body, And a flow-through plate formed with a through-hole that is not blocked by the float. 5. The method of claim 4,
The discharge port is formed bending downward of the water collecting tank,
The floating plate is hinged to one end of a protrusion formed at an end of the discharge port or coupled to a guide rod passing through the protrusion, Wherein said discharge port is opened and closed in accordance with the level of the water collecting tank. The method according to claim 1,
The non-point pollution abatement facility is separated from the filtration tank and the separation wall, connected to the filtration tank by a connection port formed in the upper part of the separation wall, connected to the backwash pump for supplying the treated water to the filtration tank, And a treatment tank having a reverse water supply pipe for supplying reverse osmosis water between the connection port and the filtration layer. delete

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